Fastening device



FIG. 1 is a left side, top, back perspective view of a fastening device;

FIG. 2 is a right side, bottom, front perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a left side view thereof, the right side being a mirror imagethereof.

CLAIM The ornamental design for a fastening device, as shown anddescribed.